01805naa a2200277 a 450000100080000000500110000800800410001910000190006024501410007926000090022052009260022965000220115565000230117765000140120065000240121465000210123865000350125965000290129465300260132365300260134965300150137570000170139070000250140770000170143277300780144918982762011-08-18       2011    bl uuuu     u00u1 u    #d1 aMELO, I. S. de  aDevelopment of mutants of Coniothyrium minitans with improved efficiency for control of Sclerotinia sclerotiorum.h[electronic resource]  c2011  aConiothurium minitans (CM) is hyperparasitic to Sclerotinia sderotiorum (55), a palhogen of many economically important crops. In this paper, we describe lhe isolation of improved mutants of CM, using a UV - irradiation regime, with altered chitinase production and tolerance to high concentration of iprodione, which are effect:iveagainst Ss. Three out of the 59 mutants obtained inhibited the mycelial growth of CM. Infectivity of sclerotia by the new mutants was assayed by the plant-tissue-based system using carrot segments. More than 80%of sclerotia were colonized by lhe mutants and the wild-type CM. The mutant strains retained ability to produce significant amounts of chitinase. The mutants differed frorn their wild-type strain in appearance, morphology and sporulation. In conclusion, the results presented here provide evidence that lhe new biotypes of C. minitans are effective in controlling S.sclemtiarum.  aAntifungal agents  aBiological control  aiprodione  aControle biológico  aDoença fúngica  aFungo para controle biológico  aSclerotinia sclerotiorum  aAntibiotic production  aConiothvrium minitans  aResistance1 aMORETINI, A.1 aCASSIOLATO, A. M. R.1 aFAULL, J. L.  tJournal of Plant Protection Research, Varsóviagv. 51, n. 2, p. 5, 2011.